18-05-2010, 08:57 PM
Smart Dust.ppt (Size: 376.5 KB / Downloads: 610)
SMART DUST
SUBMITTED BY
S SRIJITH
INTRODUCTION
What is Smart Dust
What are its components
How it is implemented
What are its applications
What are its advantages
What is smart dust
Smart Dust is a self-contained network of tiny motes each having the capability of sensing and monitoring the environment conditions.
First devoloped by professor Kris Pister at the University of California, Berkeley
Motes
They are tiny particles which will be around the size of a grain of sand
They contain sensors which have the computational capability, power supply, programmable microprocessor, analog circuitry
A network of these motes leads to SMART DUST project
Can communicate with a base station or with other motes depending on the application
Base Station Transceiver
It is used to retrieve the data stored by the motes
It consists of a laser source and a receiver
Enables communication with the motes
Requirements
Power
Sensors
Efficient Communication
Components
Sensors
Corner Cube Retro-reflector (Passive Transmitter)
Active Transmitter
Photo detector
Solar cell, DSP, Analog I/O, Power Capacitor, Thick Film Battery
Implementation
Sensors monitors the atmosphere
Communication can be of two types:
Active Communication and Passive
Communication
Active Communication
It consists of an onboard laser, collimating lens, beam steering mirror
Active Communication can be used for mote-to-mote communication if required
High power Density but high power consumption
Passive Communication
Corner Cube Retro-Reflector
Base Station with a Receiver and a laser source
Enables Bi-directional Communication
Line of Sight required
It consists of a photo detector in order to detect the signal and receive it
The DSP (digital signal processor) is used to process signals received.
Power
It consists of a lithium battery
Key constraint in the design of a mote
The battery and Capacitor can store upto1J/cubic mm and 10mJ/ cubic mm
It contains a timer which monitors the operation of a mote
Applications
Military Applications
Medical Applications
Climate monitoring
Virtual Keyboard
Structure Maintenance
Advantages
Good Functionality
Small Size
Better Connectivity
Low Cost
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